34092 City of Wells heads over Red Cow crossing and into Exeter St . Davids with an express from North Devon and north Cornwall before tackling the severe climb up to Exeter Central and the train's onward run up the Southern Region main line to the South Coast and Waterloo . There will doubtless be a Southern Region banking engine waiting further down the line here at St. Davids to assist this working up to Central , with its grade too steep for the unassisted " Pacific " on its own, and it may be that 34092 will come off at Central with a fresh engine coming down from Exmouth Junction to work this train forward .